The following schema describes how to use the audiopreproc module to identify DTMF dial tones.
[DtmfAudioNet] 0 = a, ts ← audio(MONO, input) 1 = f <- frontend(_, a) 2 = nf <- normalizer(_, f) 3 = d ← audiopreproc(T, a, nf) 4 = output ← wout (_, w:d, ts)
0
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The audio module processes the mono audio. |
1
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The frontend module converts the audio data from 0 into front-end frame data. |
2
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The normalizer module normalizes the frame data from 1. |
3
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The audiopreproc module in DTMF identification mode (T) processes the audio (a) and normalized frame data (nf). |
4
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The wout module writes the DTMF label information (d) to the output file. |
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